let levels = [
    [
        [30, 10,],
    ],
    [
        [50, 0,],
        [100, 100,],
    ],
    [
        [50, 0,],
        [100, 100, 2,],
        [50, 50,],
        [200, 100,],
    ],
    [
        [40, 10,],
        [80, 10,],
        [220, 10,],
        [120, 10,],
        [180, 10,],
        [200, 30,],
        [50, 30,],
        [110, 30,],
        [250, 30,],
        [200, 100,],
        [50, 50,],
    ]
]
